EP0878785A2 - Universelles Sicherungselement und Verfahren zu seiner Herstellung - Google Patents
Universelles Sicherungselement und Verfahren zu seiner Herstellung Download PDFInfo
- Publication number
- EP0878785A2 EP0878785A2 EP98106917A EP98106917A EP0878785A2 EP 0878785 A2 EP0878785 A2 EP 0878785A2 EP 98106917 A EP98106917 A EP 98106917A EP 98106917 A EP98106917 A EP 98106917A EP 0878785 A2 EP0878785 A2 EP 0878785A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- resonant
- resonant circuit
- circuits
- resonant circuits
- articles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
- G08B13/2417—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags having a radio frequency identification chip
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2428—Tag details
- G08B13/2448—Tag with at least dual detection means, e.g. combined inductive and ferromagnetic tags, dual frequencies within a single technology, tampering detection or signalling means on the tag
Definitions
- the invention relates to a universal element for Securing items against theft, at least one has electromagnetic resonant circuit which in Query field of an article monitoring device for Is emitted a characteristic signal, which subsequently triggers an alarm, as well as a Method of manufacturing the universal securing element.
- Resonant circuits with resonance frequencies (RF) in the mega hertz range are increasingly becoming electronic Article security used.
- the main area of application is Retail trade. They are usually in the form of Tags and labels provided and machine or manually connected to the items to be backed up.
- so-called source integration is becoming increasingly common to use, i.e. the securing element is already during the manufacturing or packaging process in the Article or integrated into its packaging.
- An RF security element is already known from EP 0 665 705 A2 known that consists of two conductive, spiral turns (spirals). The two Spirals are separated by a dielectric layer separated and arranged so that they are at least partially overlap.
- Such resonance frequency fuse elements are highly flexible. Since they are also very thin and flat, they can be easily printed with the desired imprint in printers. This imprint either serves the customer information or it is machine-readable information, preferably a barcode. Barcodes are a cost-effective solution when it comes to providing machine-readable information. However, it is disadvantageous that a barcode is always brought in the immediate vicinity of the barcode reader based on optical principles in order to be able to be identified. Furthermore, the barcode reader can only decrypt the information if the barcode is freely accessible, i.e. not covered. The use of a source-integrated security element with a barcode will therefore only make sense - if at all - in exceptional cases.
- the invention is based, an inexpensive task universal securing element and a method to propose for its manufacture.
- the task is related to the universal securing element solved in that at least one more electromagnetic resonant circuit is provided, the specific, encoded information about the item includes.
- This encoded information is about a Remote query available and 'readable'. Remote inquiry takes place e.g. by means of a broadband query field that the Resonance frequencies in the universal fuse element contained resonant circuits. It is easy to see that the storage capacity of the universal securing elements on the number of additional resonant circuits is determined.
- the resonance frequency of the at least one further electromagnetic Resonant circuit outside of Resonance frequency of the resonant circuit for the electronic article surveillance is standardized and lies for one Variety of surveillance systems at 8.2 MHz.
- a favorable embodiment of the invention universal securing element is that a Resonant circuit made of two winding conductor tracks composed, at least partially overlapping are arranged on both sides of a dielectric layer.
- universal securing element In order to increase the storage capacity of the invention universal securing element is proposed that a Element that has essentially the same dimensions as the universal security element, with information-bearing Resonance resonant circuits is equipped. This additional element comes with the universal element connected, e.g. it is glued to the back.
- the task becomes solved that on a carrier at least one more electromagnetic resonant circuit is applied, the specific, encoded information about the item includes.
- the procedure is essentially that identical resonant circuits for the identification of Articles are used, the resonant circuits subsequently encoded with the specific information will.
- Possible configurations for the subsequent coding of the Resonant circuits are based on a change in characteristic properties of the resonant circuits. These characteristic properties are: the resonance frequency RF or the capacitance K and the inductance L, which directly determine the resonance frequency Resonance amplitude A (RF) and / or the quality Q of the Resonant circuit.
- RF resonance frequency
- One or more of these sizes Resonant circuits for the identification of articles are determined by physical action in a defined manner and changed way.
- One possibility for coding the resonant resonant circuits provides that selected resonant resonant circuits are short-circuited.
- the short circuit occurs between opposite conductor tracks through the dielectric layer.
- the methods that can be used to generate the short circuit are identical to the methods that have already become known in connection with the deactivation of resonant circuits for securing articles.
- a common method is to pierce the resonant circuit at a selected point with a needle-shaped, possibly heated pin. It is also possible to bring opposing conductor tracks into contact with one another by applying pressure and / or heat.
- a short circuit can also be achieved in that an arc discharge between two opposite conductive areas of the resonant circuit is achieved by applying a correspondingly strong electric field.
- the electric field for generating the short circuit is either provided via contact electrodes, or it is generated without contact by applying a sufficiently strong energy pulse in the region of its resonance frequency to the selected resonant circuit.
- conductive metal of the conductor tracks diffuses into the dielectric layer, so that a permanently conductive connection is created between the coils.
- the Resonant circuits to identify the articles be encoded by the length of the traces of the Resonance resonant circuits is reduced or enlarged.
- a simple method of reducing the length of the Conductor tracks provides that of the one to be encoded Resonant circuit part (open circuit) with a cutting device is separated.
- the Conductor of the resonant circuit to be coded one Melt connection introduced. This melts as a result of Temperature increase as soon as the current that flows through it exceeds a predetermined value. Again, the Current in the resonant circuit through electrode contact or contactless in the manner described above respectively.
- An alternative method for coding the resonant circuits provides that the resonant circuits to Identification of the items to be encoded by being selective open resonant circuits (at least one turn) to the Resonant circuits are added. This will make the Changed resonant frequency of the resonant circuits.
- the turn can be in series or added in parallel.
- at least an additional turn to a resonant circuit add a variety of different Create resonance frequencies.
- Another way to change the physical Properties consists in a change in the capacity of the Resonant circuits. This will result in an increase in capacity achieved that the area in which the by the dielectric layer separate conductor tracks of the two Coils overlap, is increased.
- the resonance frequency is thereby changed that two separate, at least partially overlapping coils shorted to one will.
- the point at which the short circuit occurs is determined subsequently the resulting resonance frequency of the coded resonant circuit.
- the amplitude of the resonant circuit is changed in a defined manner for the purpose of coding.
- This is advantageously done, for example, by connecting the resonant circuit to be coded to a conductor track of the resonant circuit for article security. The latter then takes on the function of an antenna for the resonant circuit to be coded.
- the resonant circuit to be coded is connected to a turn which acts only as an antenna and the length of which can also be selected such that the amplitude of the resonant frequency is changed in the desired manner.
- a deliberate change in the physical quality Q of the resonant circuit can, for example, by means of following method can be achieved: short circuits generated between two opposite conductor tracks. There these shorts typically have a higher resistance than the conductive traces have, the goodness of the resonant circuit to be encoded is reduced. So the decisive factor for the change in quality is Change in the resistance of the resonant circuit. This Change can also be achieved as follows: Since the Resistance is inversely proportional to the width of the trace it is sufficient to take appropriate measures to reduce the width to change.
- Fig. 1 shows a plan view of an embodiment of the universal securing element according to the invention 1. It consists of a resonant circuit 2, which in Query field of an electronic article surveillance for Emission of a characteristic signal is excited and subsequently triggers an alarm.
- the resonant circuit 2 is arranged in the outer region of the carrier 14 and encloses two further resonant circuits 3, the identification of appropriately secured articles to serve.
- FIG. 2 is a top view of an arrangement of Resonant circuits 3 for the identification of articles to see.
- This arrangement is an addition to one universal element 1 according to the invention is intended and used to increase the storage capacity many times over.
- Fig. 3 shows the typical frequency spectrum of a resonant circuit 2; 3. It is characterized in that the Amplitude A (F) and thus the intensity of the signal pronounced maximum (peak) in the area around the resonance frequency (RF) owns.
- the quality of a resonant circuit 2; 3 is defined as the quotient of the resonance frequency RF and 3 dB bandwidth.
- FIGS. 4a to 4c show various possibilities of how a resonant circuit 3 is permanently short-circuited (FIG. 4a to 4c) and how the circuit can be interrupted.
- the short circuit - shown in FIGS. 4a to 4c - takes place through the dielectric layer 13.
- the resonant circuit 3 is pierced in at least one area of opposite conductor tracks 4, 5 by means of a needle-shaped pin 6.
- An alternative provides (Fig. 4b) that the upper conductor track 4 is pressed against the lower conductor track 5 by means of a specially shaped pressing tool 7. In order to achieve complete removal of the dielectric layer 13, the pressing tool 7 is additionally heated.
- a short circuit can occur also - as indicated in Fig. 4c - by means of a electrical arc discharge through the dielectric layer 13 done through.
- A is required for this correspondingly strong energy impulse in the area of Resonance frequency of the resonant circuit.
- This Energy pulse can either be by means of contact electrodes be provided, or it is provided by a transmitter in the form of electromagnetic radiation emitted. Diffuse as a result of the arc discharge Particle of the conductive material - usually will aluminum is used in the dielectric layer and carbonate them.
- FIG. 4d Another possibility for deactivating and thus changing the information content of a resonant circuit is to interrupt the conductor tracks 4, 5. According to one embodiment, this is done mechanically - see FIG. 4d - by means of a cutting device 10. According to an alternative solution, a fusible link (fuse) is built into the conductor track 4, 5, which melts and evaporates when the current flow is sufficiently high due to the heating.
- 5a shows a schematic illustration of a special embodiment of the element according to the invention, in which a conductor track is attached in series. In FIG. 5b, the conductor track is added in parallel, while FIG. 5c describes the case in which a conductor track which is in the opposite direction to the conductor track 4; 5 is wound, is added serially. With these configurations, the resonance frequency of the resonance resonant circuits 3 can be changed in a defined manner.
- a change in the resonant frequency of a resonant circuit 3 can also be achieved in that the Capacity K of the resonant circuit is increased or decreased.
- the capacitance K increased by adding a conductor track section 16 is, the conductor track section 16 is placed so that he an area of the lower conductor track 4 or the upper Conductor 5 of the resonant circuit 3 is opposite.
- Trace section 16 and trace 4; 5 are about one Junction 12 connected to each other.
- Fig. 7 shows a schematic representation of a Resonant circuit 3, in which the resonance frequency is changed in that two overlapping coils 4; 5 by short circuit at one of the connection points 12 in a Coil are transformed. The resulting resonance frequency depends on the location of the connection point 12.
- a solution is shown schematically, via the specifically influences the amplitude A (RF) of the resonance frequency can be.
- RF amplitude A
- 5 of Resonant circuit 3 is an additional turn 17th provided that once they are at the junction 12 with the coil 4; 5 is connected as an antenna for this coil 4; 5 acts.
- the amplitude signal S changed in a defined manner.
- resonant circuits 3 with two coils 4, 5 on either side of a dielectric Layer - at least partially overlapping - are arranged.
- the invention is not based on this Design limited, but it is also without further applicable to resonant circuits which are based on a Side of the dielectric layer 13, a coil and a Capacitor plate and on the other side e.g. just one Have capacitor plate.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
- Ropes Or Cables (AREA)
- Metal Rolling (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Description
Barcodes bilden eine kostengünstige Lösung, wenn es darum geht, maschinenlesbare Informationen bereitzustellen. Nachteilig ist jedoch, daß ein Barcode stets in unmittelbare Nähe des auf optischen Prinzipien basierenden Barcode-Lesers gebracht werden, um identifiziert werden zu können. Weiterhin kann der Barcode-Leser die Information nur entschlüsseln, wenn der Barcode frei zugänglich, also nicht verdeckt ist. Die Verwendung eines quellenintegrierten Sicherungselements mit Barcode wird daher -wenn überhaupt-nur in Ausnahmefällen Sinn machen.
Das elektrische Feld zur Erzeugung des Kurzschlusses wird entweder über Kontaktelektroden bereitgestellt, oder es wird berührungslos erzeugt, indem der ausgewählte Resonanzschwingkreis mit einem ausreichend starken Energie-Impuls im Bereich seiner Resonanzfrequenz beaufschlagt wird. Als Folge der Bodenentladung diffundiert leitfähiges Metall der Leiterbahnen in die dielektrische Schicht, so daß eine permanent leitend Verbindung zwischen den Spulen geschaffen wird. Eine derartige Deaktivierungsmethode ist übrigens in der EP 0 181 327 A2 beschrieben.
Für den Fall, daß zumindest zwei Resonanzschwingkreise zur Identifizierung von Artikeln vorhanden sind, können auch diese miteinander verbunden werden; der eine Resonanzschwingkreis dient dann als Antenne für den anderen.
Eine dritte Möglichkeit sieht vor, daß der zu kodierende Resonanzschwingkreis mit einer Windung verbunden wird, die nur als Antenne agiert und deren Länge ebenfalls so gewählt werden kann, daß die Amplitude der Resonanzfrequenz in gewünschter Weise geändert wird.
Der Kurzschluß - dargestellt in den Fig. 4a bis Fig. 4c - erfolgt durch die dielektrische Schicht 13 hindurch. Wie in Fig. 4a zu sehen, wird der Resonanzschwingkreis 3 in zumindest einem Bereich gegenüberliegender Leiterbahnen 4, 5 mittels eines nadelförmigen Stiftes 6 durchstochen. Eine Alternative sieht vor (Fig. 4b), daß die obere Leiterbahn 4 mittels eines speziell geformten Preßwerkzeuges 7 gegen die untere Leiterbahn 5 gedrückt wird. Um ein vollständiges Entfernen der dielektrischen Schicht 13 zu erreichen, wird das Preßwerkzeug 7 zusätzlich beheizt.
Fig. 5a zeigt eine schematische Darstellung einer speziellen Ausgestaltung des erfindungsgemäßen Elements, bei dem eine Leiterbahn seriell angefügt ist. In Fig. 5b ist die Leiterbahn parallel angefügt, während Fig. 5c den Fall beschreibt, daß eine Leiterbahn, die in entgegengesetzter Richtung zur Leiterbahn 4; 5 gewickelt ist, seriell angefügt ist. Durch diese Ausgestaltungen läßt sich jeweils die Resonanzfrequenz der Resonanzschwingkreise 3 in definierter Weise ändern.
- 1
- Sicherungselement
- 2
- Resonanzschwingkreis (EAS)
- 3
- Resonanzschwingkreis (ID)
- 4
- untere Spule
- 5
- obere Spule
- 6
- nadelförmiger Stift
- 7
- Preßwerkzeug
- 8
- elektrisch leitende Verbindung
- 9
- Leiterbahn
- 10
- Schneidwerkzeug
- 11
- Schmelzverbindung
- 12
- Verbindungsstelle
- 13
- dielektrische Schicht
- 14
- Träger
- 15
- Schwingkreis
- 16
- Leiterbahnabschnitt
- 17
- zusätzliche Windung bzw. zusätzliche Spule
- RF
- Resonanzfrequenz
- Q
- Güte
- A(RF)
- Signalamplitude der Resonanzfrequenz
- C
- Kapazität
- L
- Induktivität
Claims (14)
- Universelles Element zur Sicherung von Artikeln gegen Diebstahl, das zumindest einen elektromagnetischen Resonanzschwingkreis aufweist, der im Abfragefeld einer Artikelüberwachungsvorrichtung zur Aussendung eines charakteristischen Signals angeregt wird, welches nachfolgend einen Alarm auslöst,
dadurch gekennzeichnet,
daß zumindest ein weiterer elektromagnetischer Resonanzschwingkreis (3) vorgesehen ist, der spezifische, kodierte Information über den Artikel beinhaltet. - Universelles Sicherungselement nach Anspruch 1,
dadurch gekennzeichnet,
daß die Resonanzfrequenz (RF) des zumindest einen weiteren elektromagnetischen Resonanzschwingkreises (3) außerhalb der Resonanzfrequenz (RF) des Resonanzschwingkreises (2) für die elektronische Artikelsicherung liegt. - Universelles Sicherungselement nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß sich ein Resonanzschwingkreis (2; 3) aus zwei gewundenen Leiterbahnen (9) zusammensetzt, die zumindest teilweise überlappend zu beiden Seiten einer dielektrischen Schicht (13) angeordnet sind. - Universelles Sicherungselement nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet,
daß der Resonanzschwingkreis (3) bzw. die Resonanzschwingkreise (3), die zur Identifizierung der Artikel dienen, im Innenbereich des Resonanzschwingkreises (2) zur elektronischen Artikelsicherung liegen, wobei der Innenbereich durch die inneren Leiterbahnen (9) des Resonanzschwingkreises (2) zur elektronischen Artikelsicherung begrenzt ist. - Verfahren zur Herstellung eines universelles Sicherungselements zur Sicherung von Artikeln gegen Diebstahl, das zumindest einen elektromagnetischen Resonanzschwingkreis aufweist, der auf einem Träger angeordnet wird und im Abfragefeld einer Artikelüberwachungsvorrichtung zur Aussendung eines charakteristischen Signals angeregt wird, welches nachfolgend einen Alarm auslöst,
dadurch gekennzeichnet,
daß auf den Träger (14) zumindest ein weiterer elektromagnetischer Resonanzschwingkreis (3) aufgebracht wird, der spezifische, kodierte Information über den Artikel beinhaltet. - Verfahren nach Anspruch 5,
dadurch gekennzeichnet,
daß im wesentlichen identische Resonanzschwingkreise (3) zur Identifizierung von Artikeln verwendet werden, wobei die Resonanzschwingkreise (3) nachfolgend mit der spezifischen Information kodiert werden. - Verfahren nach Anspruch 6 oder 7,
dadurch gekennzeichnet,
daß die charakteristischen Eigenschaften (Resonanzfrequenz RF bzw. Kapazität K und Induktivität L; Resonanzamplitude A(RF); Güte Q) der Resonanzschwingkreise (3) zur Identifizierung von Artikeln durch physikalische Einwirkung auf die Resonanzschwingkreise (3) in definierter Art und Weise geändert werden. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß die Resonanzschwingkreise (3) zur Identifizierung der Artikel kodiert werden, in dem ausgewählte Resonanzschwingkreise (3) kurzgeschlossen werden. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß die Resonanzschwingkreise (3) zur Identifizierung der Artikel kodiert werden, indem der Stromfluß durch die Leiterbahnen (9) unterbrochen wird. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß die Resonanzschwingkreise (3) zur Identifizierung der Artikel kodiert werden, indem die Länge der Leiterbahnen (9) der Resonanzschwingkreise (3) vergrößert oder verkleinert wird. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß die Resonanzschwingkreise (3) zur Identifizierung der Artikel kodiert werden, indem selektiv offene Schwingkreise (15) an die Resonanzschwingkreise (3) angefügt werden. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß die Resonanzschwingkreise (3) zur Identifizierung der Artikel kodiert werden, indem ein zusätzlicher Leiterbahnabschnitt (16) mit einer Spule (4; 5) verbunden wird, der so plaziert ist, daß er der anderen Spule (5; 4) gegenüberliegt. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß zwei zumindest teilweise überlappende Spulen (4, 5) so kurzgeschlossen werden, daß sie nachfolgend eine Spule mit einer geänderten Resonanzfrequenz bilden. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß ein Resonanzschwingkreis (3) mit einer Spule (2; 3; 17) verbunden wird, wobei die Spule (2; 3; 17) als Antenne für den Resonanzschwingkreis (3) dient.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19719434 | 1997-05-12 | ||
DE19719434A DE19719434A1 (de) | 1997-05-12 | 1997-05-12 | Universelles Sicherungselement und Verfahren zu seiner Herstellung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0878785A2 true EP0878785A2 (de) | 1998-11-18 |
EP0878785A3 EP0878785A3 (de) | 2000-01-12 |
EP0878785B1 EP0878785B1 (de) | 2003-12-17 |
Family
ID=7828987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98106917A Expired - Lifetime EP0878785B1 (de) | 1997-05-12 | 1998-04-16 | Universelles Sicherungselement und Verfahren zu seiner Herstellung |
Country Status (6)
Country | Link |
---|---|
US (1) | US6104278A (de) |
EP (1) | EP0878785B1 (de) |
JP (1) | JPH10334356A (de) |
AT (1) | ATE256905T1 (de) |
DE (2) | DE19719434A1 (de) |
ES (1) | ES2212165T3 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19951561A1 (de) | 1999-10-27 | 2001-05-03 | Meto International Gmbh | Sicherungselement für die elektronischen Artikelsicherung |
FR2812482B1 (fr) * | 2000-07-28 | 2003-01-24 | Inside Technologies | Dispositif electronique portable comprenant plusieurs circuits integres sans contact |
FR2815176B1 (fr) * | 2000-10-11 | 2003-01-10 | A S K | Antenne spirale d'emission et/ou reception a coupures |
US7501954B1 (en) * | 2000-10-11 | 2009-03-10 | Avante International Technology, Inc. | Dual circuit RF identification tags |
US6866752B2 (en) | 2001-08-23 | 2005-03-15 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method of forming ultra thin film devices by vacuum arc vapor deposition |
US7164358B2 (en) * | 2004-02-17 | 2007-01-16 | Sensormatic Electronics Corporation | Frequency divider with variable capacitance |
US7355516B2 (en) * | 2004-12-23 | 2008-04-08 | Checkpoint Systems, Inc. | Method and apparatus for protecting culinary products |
FR2886467B1 (fr) * | 2005-05-25 | 2010-10-22 | Oberthur Card Syst Sa | Entite electronique a antenne magnetique |
US20070164865A1 (en) * | 2005-11-04 | 2007-07-19 | Gerald Giasson | Security sensor system |
US8026818B2 (en) * | 2006-12-20 | 2011-09-27 | Checkpoint Systems, Inc. | EAS and UHF combination tag |
WO2010066955A1 (fr) | 2008-12-11 | 2010-06-17 | Yves Eray | Circuit d'antenne rfid |
Citations (8)
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DE3344782A1 (de) * | 1982-12-14 | 1984-06-14 | Shigekazu Tokyo Takeda | Kartenfoermiger detektor und eintritt- und austritt-kontrollanlage mit einem derartigen detektor |
EP0380426A1 (de) * | 1989-01-25 | 1990-08-01 | Tokai Electronics Co., Ltd. | Resonanzaufkleber sowie Verfahren zur Herstellung |
GB2246492A (en) * | 1990-07-26 | 1992-01-29 | Chikara Shimamura | Tag identification system having different resonant frequencies |
WO1994010663A1 (en) * | 1992-10-26 | 1994-05-11 | Motorola Inc. | Rf tagging system and rf tags and method |
WO1994028523A1 (en) * | 1993-05-27 | 1994-12-08 | Motorola Inc. | Improved rf tagging system with multiple decoding modalities |
US5446447A (en) * | 1994-02-16 | 1995-08-29 | Motorola, Inc. | RF tagging system including RF tags with variable frequency resonant circuits |
US5510769A (en) * | 1993-08-18 | 1996-04-23 | Checkpoint Systems, Inc. | Multiple frequency tag |
US5604485A (en) * | 1993-04-21 | 1997-02-18 | Motorola Inc. | RF identification tag configurations and assemblies |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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GB1577920A (en) * | 1976-11-01 | 1980-10-29 | Nedap Nv | Detection plate for identification systems |
-
1997
- 1997-05-12 DE DE19719434A patent/DE19719434A1/de not_active Withdrawn
-
1998
- 1998-04-16 AT AT98106917T patent/ATE256905T1/de not_active IP Right Cessation
- 1998-04-16 EP EP98106917A patent/EP0878785B1/de not_active Expired - Lifetime
- 1998-04-16 ES ES98106917T patent/ES2212165T3/es not_active Expired - Lifetime
- 1998-04-16 DE DE59810437T patent/DE59810437D1/de not_active Expired - Fee Related
- 1998-05-08 JP JP10125559A patent/JPH10334356A/ja active Pending
- 1998-05-12 US US09/075,845 patent/US6104278A/en not_active Expired - Fee Related
Patent Citations (8)
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DE3344782A1 (de) * | 1982-12-14 | 1984-06-14 | Shigekazu Tokyo Takeda | Kartenfoermiger detektor und eintritt- und austritt-kontrollanlage mit einem derartigen detektor |
EP0380426A1 (de) * | 1989-01-25 | 1990-08-01 | Tokai Electronics Co., Ltd. | Resonanzaufkleber sowie Verfahren zur Herstellung |
GB2246492A (en) * | 1990-07-26 | 1992-01-29 | Chikara Shimamura | Tag identification system having different resonant frequencies |
WO1994010663A1 (en) * | 1992-10-26 | 1994-05-11 | Motorola Inc. | Rf tagging system and rf tags and method |
US5604485A (en) * | 1993-04-21 | 1997-02-18 | Motorola Inc. | RF identification tag configurations and assemblies |
WO1994028523A1 (en) * | 1993-05-27 | 1994-12-08 | Motorola Inc. | Improved rf tagging system with multiple decoding modalities |
US5510769A (en) * | 1993-08-18 | 1996-04-23 | Checkpoint Systems, Inc. | Multiple frequency tag |
US5446447A (en) * | 1994-02-16 | 1995-08-29 | Motorola, Inc. | RF tagging system including RF tags with variable frequency resonant circuits |
Also Published As
Publication number | Publication date |
---|---|
EP0878785B1 (de) | 2003-12-17 |
EP0878785A3 (de) | 2000-01-12 |
DE19719434A1 (de) | 1998-11-19 |
DE59810437D1 (de) | 2004-01-29 |
JPH10334356A (ja) | 1998-12-18 |
ATE256905T1 (de) | 2004-01-15 |
ES2212165T3 (es) | 2004-07-16 |
US6104278A (en) | 2000-08-15 |
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